PRECIPITATION AND DISSOLUTION KINETICS IN AL-CU-MG-FE-NI ALLOY-2618 AND AL-ALUMINA PARTICLE METAL-MATRIX COMPOSITE

Authors
OGUOCHA INA YANNACOPOULOS S
Citation
Ina. Oguocha et S. Yannacopoulos, PRECIPITATION AND DISSOLUTION KINETICS IN AL-CU-MG-FE-NI ALLOY-2618 AND AL-ALUMINA PARTICLE METAL-MATRIX COMPOSITE, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 231(1-2), 1997, pp. 25-33
Citations number
41
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
231
Issue
1-2
Year of publication
1997
Pages
25 - 33
Database
ISI
SICI code
0921-5093(1997)231:1-2<25:PADKIA>2.0.ZU;2-F
Abstract
The kinetics of precipitation and dissolution of precipitate phases in AA2618 and AA2618-alumina particle-reinforced metal matrix composite were studied using differential scanning calorimetry (DSC). Thermal ef fect peaks due to GPB (Guinier-Preston-Bagaryatskii) zone formation, G PB zone dissolution, formation of the theta' and S' phases, and the di ssolution of the theta' and S' phases were identified. The kinetic par ameters for GPB zone formation and dissolution reactions, calculated b y using both the modified Avrami-Johnson-Mehl (AJM) equation and the K issinger-type expressions, were comparable. GPB zone formation was fou nd to be suppressed in the composite material while, on the other hand , GPB zone dissolution was enhanced. (C) 1997 Elsevier Science S.A.